Improvement in insulators for telegraph-wires



H.READ; lmprovment in Insulators for TeIegraph-Wifres. No.115,521.

Patented May 30,1871.

UNITED STATES PATENT OFFICE.

HORATIO READ, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO HIMSELF AND B. B.HAGERTY, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN INSULATORS FOR TELEGRAPH-WIRES.

Specification forming part of Letters Patent No. 115,521, dated May 30,1871.

To all whom it may concern:

Be it known that I, HORATIO READ, of J ersey City, in thecounty ofHudson, in the State of New Jersey, have invented a new and usefulImprovement in Insulators; and I do hereby declare the following to be afull, clear, and exact description thereof, which will enable thoseskilled in the art to make and use the same, reference being had to theaccompanying drawing forming part of this specification, in whichdrawing- Figure 1 represents a vertical central section of thisinvention. Fig. 2 is a transverse section thereof.

Similar letters indicate corresponding parts.

This invention consists in the arrangement of a metal screw-socket inthe interior of a glass insulator, in combination with a correspondingsupporting-screw, in such a manner that said insulator can be secured totelegraph poles or to buildings, or wherever it may be desired, in anyposition, with the greatest ease and facility.

A represents a glass insulator, such as is commonly used for the purposeof insulating telegraph-wires or conductors of electrical currents. Inthe interior of this insulator'lsecure a metal socket, a, which isfastened by cement or by pressing it into the glass, or in any otherdesirable manner, and which is provided with an internal screw thread,as shown. This screw-thread may be longer or shorter, and if desiredonly a portion of the thread may be used, so that half a turn would besufficient to screw-thread in the socket fits on a thread cut on the endofa pin, B, which serves to support the insulator. This pin is securedto the telegraph-pole or building, or to any other place where theinsulator is to be attached, and it will be readily seen that, by meansofmy screwsocket, the operation of attaching a glass insulator ismaterially facilitated. It will be seen that the insulator is firmlysupported on the pin B. The screw-socket a is placed at the base of theopening, which receives the projecting pin so that the plain orunthreaded part of this pin bears against the sides of the opening orcavity, and serves to support the insulator, while the screw-socketprevents its displacement. These two features are necessary inconsequence of the great strain upon the insulator.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

A telegraphinsulator, A, provided with a smooth socket, in the innerpart of which is secured a metallic screw-thimble, a, to screw on thesupporting-pin, while the outer portion of said socket forms a guide forthe body of the supporting-pin, substantially as described.

HORATIO READ. Vitnesses W. HAUFF, E. F. KASTENHUBER.

